PICS: Serena Williams Toils in Sweden

US tennis player Serena Williams is pictured during a press conference prior to her participation in the Swedish Open Tennis tournament, in Bastad, Sweden, on July 14, 2013. (Photo: AFP/Getty Images)

US tennis player Serena Williams, right, hits a ball during a training session as her coach and boyfriend Patrick Mouratouglou looks on, prior to her participation in the Swedish Open Tennis tournament, in Bastad, Sweden, July 14, 2013. (Photo: AP)

US tennis player Serena Williams, left, arrives for a press conference, together with her coach and boyfriend Patrick Mouratouglou, prior to her participation in the Swedish Open Tennis tournament, in Bastad, Sweden, July 14, 2013. (Photo: AP)

US tennis player Serena Williams warms up next to her Yorkshire terrier 'Chip' during a training session, prior to her participation in the Swedish Open Tennis tournament, in Bastad, Sweden, on July 14, 2013. (Photo: AFP/Getty Images)